Bit-stock.



F. W. LARSON.

BIT STOCK.

APPLICATION FILED APR. 22, 1912.

1, 1 33,046. Patented Mar. 23, 1915.

THE NORRIS FETERSJIQrPHU O-LITHOH WASHINGTVON. D. C.

FRANK W. LARSON, 0F HARTFORD, CONNECTICUT.

' BIT-STOCK.

' Specification of Letters Patent.

' Patented Mar. 23, 1915.

Application filed April 22, 1912. Serial No.692,401.

To all whom it may concern:

Be it known that I, FRANK WQLARSON, a citizen of Sweden, residing atHartford, in the county of Hartford and State of Connecticut, haveinvented certain new and useful Improvements in Bit-Stocks, of which thefollowing is a specification.

This invention relates to bit stocks of a class in which the spindle canbe rotated to the right or to the left by oscillating a crank.

The object of my invention is to produce a bit stock through the mediumof which great force can be brought to bear upon the work.

The invention consists in the combination and arrangement of parts to behereinafterv fully described in the following specification, pointed outin the claim and illustrated in the accompanying drawings which form apart of the said specification and in which- V Figure 1 is a frontelevation of my improved bit stoc k. Fig. 2 is a side elevation. Fig. 3is a sectional detail.

Like reference characters indicate corresponding parts throughout theseveral views.

1 is the frame of my improved bit stock provided with a handle 2 andwith a chuck 3 in which the spindle 4 is carried. Within the frame 1 atransverse shaft 5 is mounted and upon the same a beveled gear wheel 6and ratchet wheel 7 are fastened, the former of which operativelyengages a terminal toothed beveled gear wheel 8 of the spindle 4 and thelatter of which is capable of being engaged by a pawl 9 pivotallycarried by a spring-pressed pin 10 disposed in the recessed portion of alever 11 provided with a hand grip 12 and mounted loosely upon shaft 5.

14 and 15 are pins carried by the lever 11 adjacent the pawl 9 and whichnormally prevent the otherwise occasional movement of that pawl from oneside of the lever to the other. When it is desired to change the pawlover from one side of the lever to the other the spring-pressed pin 10is pressed in toward the frame thus forcing the pawl beyond thetermination of the pins 14 and 15 when it may be moved pastthem intoposition upon the opposite side of the lever 11.

Operation: Movement of the lever 11 toward the pawl 9 will cause thelatter member to engage the serrated periphery of the ratchet wheel 7which is made fast to shaft 5 and to move that wheel and shaft in thethe spindle in one direction. By throwing the pawl to the other side ofthe lever 11 past the pins 14 and 15 and then moving the lever towardthe pawl the spindle 4 will be caused to rotate in the oppositedirection.

\Vhat is claimed is A'bit stock comprising a lever loose upon the stockshaft, a pawl having oppositely directed teeth with free ends, stoppinscarried by said lever for said pawl and a springpressed support for saidpawl carried by said lever whereby said pawl may be moved out of theplane of said stop pins to permit its passage and aratchet wheelengageable by said pawl in either direction and geared to said stockshaft thereby to. effect a. reverse movement of said stock shaft.

In testimony that I claim the foregoing as my own I have. hereto aflixedmy signature in the presence of two subscribing witnesses.

FRANK W. LARSON;

Copies of this patent may be'obtained for five cents each, by addressingthe Commissioner of Patent Washington, D. 0.? p I p

